Apparatus for recording and reproducing sound



R. S. ARTHUR. APPARATUS FOR RECORDING AND REPRODUCING SOUND. APPLICATION FILED OCT. 6, 1917. 1,355,523.

Patented Oct. 12, 1920.

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Main-Q0 UNITED- STATES RICHARD S. ARTHUR, OF NEW YORK, N. Y.

APPARATUS FOR RECORDING AND REPRODUCING SOUNR.

Specification of Letters Patent.

Patented Oct. 12, 1920.

Application filed October 6, 1917. Serial No. 195,023.

To all whom it may concern:

Be it known that I, RICHARD S. ARTHUR,

a citizen of the United States of America,

and a resident of New York city, in the county of New York and State of New York, have invented new and useful Imrovements in Apparatus for Recording and eproducing Sound, of which the following is a specification.

This invention relates more especially to the transmission of motion to the record, in sound recording and reproducing machines, so as to cause the same to travel beneath the stylus ofthe sound-box, and the objects of.

larity in the movement produced by the motor, which is transmitted to the record, if the connection is a rigid one, and detrimentally affects the sound reproduction. The objects of my invention are to remedy this and to provide a resilient or yielding connection between the motor and the record which shall turn it with suflicient positiveness and at the same time absorb any slight irregularities, such as vibrations or tremors, and give the record a perfectly smooth and uniform motion; to do this simply and inexpensively, and to obtain other advantages and results as may be brought out in the following description.

Referring to the accompanying drawings, in which like numerals of reference indicate the same parts throughout the several views,

Figure 1 is an elevation of a cylinder machine of ordinary and well-known construction illustrating the application of my invention thereto;

Fig. 2 is a section through the cylinder and record thereon.

In the particular embodiment of the invention shown in the drawings, 1 indicates a suitable frame or support in which a driving shaft 2 is mounted and driven from a spring 3 through usual and well-known mechanism having a governor 4. and starting and stopping means 5. On the drivin shaft is a worm wheel 6 engaging a worm 4 on the record shaft 8, which record shaft is shown in this particular illustration as having an end 9 to receive a record carrier in the form of a cylinder 10 for a record 11.

In carrying out my invention, 1- do not make the cylinder 10 fast upon the shaft end 9, but I wrap around said shaft end a helical spring 12 of light wire, one end of which spring is fast to the shaft and the other to the cylinder, so that as the shaft turns it transmits its motion to the cylinder through said spring. The spring is of such weight and tension that while the cylinder will be properly turned to rotate the record, any irregularities of motion from the motor, such as vibrations or tremors, will be absorbed by the spring and not transmitted to the record. Furthermore, the spring is so arranged that its connection with the cylinder is at an intermediate point in the length of the bearing of the cylinder on the shaft, so that the tension of the spring acts upon the cylinder near its transverse center and prevents any twisting of the cylinder at an cause a frictional binding connection of the cylinder on the shaft. Obviously the spring 12 can be arranged in any suitable manner, but for purposes of illustration I have shown the end of the hub of the cylinder recessed as at 13 to loosely receive the spring 12, one end 14 of said spring passing through an aperture in the wall of said recess at its inner end and being secured thereat. The other end 15 of the spring is laid over upon the extremity of the shaft end 9, preferably in the form of an eye, so that it is clamped to said shaft end by a washer 16 held by a screw 17 threaded into the shaft. Any

. other suitable mounting .of the spring may be employed, however.

While I have so far found it more d'esirable to transmit motion through the wire spring so that it tends to wind it up, it is obviously within the scope of my'invention to transmit the motion so as to unwind them, if desired.

I have found that sound reproduced by my improved method is a great deal more natural and satisfactory, especially where inexpensive machines are employed whose motors cannot be made with great nicety and exactness and the record carrier must be light and thus susceptible to vibrations and tremors. In such cases I am able by my invention to change the character of sound reproduced to a marked degree, and to secure the same effect for which it has heretofore been necessary to employ an expensive machine.

Various detail modifications and changes may be made in carrying out my invention Without departing from the spirit and scope of the invention, and I do not Wish to be understood as restricting myself except as required by the following claims when construed in the light of the prior art.

Having thus described the invention, What I claim is:

1. In a talking machine, the combination .of a record shaft, a record carrier having a hub mounted on said shaft, and a coil spring surrounding said shaft Within said hub, one end of said spring being connected to said hub at a point intermediate the length of its bearing on the shaft and the other end of said spring being connected to said shaft.

2. In a talking machine, the combination of a record shaft, a record carrier having a hub receiving said shaft, said hub providing at one end ofitself a chamber around said shaft and opening through the end of the hub, a spiral spring surrounding the shaft in said chamber and secured at its inner end to the hub, and means at the outer end of the hub for adj ustably securing the other end of the spring to the shaft.

3. In a talking machine, the combination of a record shaft, a record carrier having a hub receiving said shaft, said hub providing at one end of itself a chamber around RICHARD S. ARTHUR.

Witnesses:

HOWARD P. KING, MILDRED E. BROOKS. 

